Wrench.



No. 657,39l. Patented Sept. 4, I900. T. H. BBOSNIHAN.

WBENCH..

(Application filed Dec. 15, 1899.)

(No Model.)

J I L F l 4 Ill/11 W/TNESSES ArmfiM rs;

tion. the improvement. Fig. 3 is a transverse sec- Gr, screwing on the extreme U'NiTEn STATES PATENT oma.

RENCH.

srnorFIoATIoN- foiniiing art of Letters Patent 'No. 657,391, dated September 4, 1900.

' Application filed December 15,1899; Serialllo- 740.448. (No model-l To all whom it may concern.-

Be it known that I, THOMAS H. BROSNIHAN, a citizen of the United States, residing at Livermore Falls, in the county of Androscoggin and State of Maine, have invented a new and Improved Wrench, of which the following is a full, clear, and exact description.

The obje'ctof the invention is to provide anew and improved wrench arranged to permit a convenient, quick, and accurate adj ustment of the movable jaw and to securely grip the object, especially a pipe, without danger of the jaws slippingon the pipe.

and parts and combinations of the same, as will be fully described hereinafter and then pointed out in the claims. r

A practical embodiment of my invention is represented in the accompanying drawings, forming a part of-thisspecification, in which similar characters of reference indicate cor-' responding parts in all-the views.

Figure 1 is a side elevation of the improvement as applied, the pipe being shown in see- Fig. 2 is a sectional side elevation of t-ion of the sameon'the line 3 3 in Fig. 2. Fig. 41s a perspective view of the cheek-piece for the movable jaw. Fig. 5 is a cross-section of the shank, showing the movable jaw The improved wrench has a shank A, on which is integrally formed a fixedjaw B, opposite which is arranged a movable jaw 0,

mounted to slide on the shank A, preferably made rectangular in cross section, ,as' is plainly indicated in the drawings. In the movable jaw Oscrew's the threaded end of screw-rod D, mounted to'turn or to slide in a bearing E, formed on a collar E, held'on the shank A, adjacent to the tapering end A there0f,to form an abutment for the inner end of a handle. F, held in place on the end A and pressed against the collar E by a nut outer portion of the threaded end A, r

On the screw-rod D, adjacent to the bear- 1 ing E, but slightly separated therefrom, is secured a head D, adapted to be taken hold of by the operator to turn the screw-rod in its bearing E and move the jaw O outward or inward on the shank A, according to the direction in which the head D is turned. The opposite ends of the bearing-E and the head D are recessed toreceive a spring H, coiled around the smooth end of the screw-rod, one end of said spring resting against the hearing it andthe other against a shoulder D in ?the head D to normally hold the rod 'D in the position shown in Fig. 2, the headD' being The invention consists of novel features somewhat separated from the bearing E. ;When pressure is applied against the-jaw O jupon gripping a pipe or other object, thenthe ,spring H is free to yield until the head D ,abnts against the bearing E.

z The jaw B is provided with a cheek-piece 5B, formed at its outer face with teeth and on lits back with an apertured lug B fitting into a recess B formed in the fixed jaw B, said @apertured lug being engaged by a tapering pin 1B driven transversely throughthe jaw B, so as to hold the cheek-piece s'ecurelyin position ion the jaw, but to allow of removing the latter in case it is worn out. Opposite the cheek- ;piece B is arranged a cheek-piece C for the movable jaw O, and said cheek-piece is provided on its face with teeth similar to those of the cheek-piece B, and the back 0 of this jcheek -piece 0 is inclined or made wedgeshaped, a tongue 0 being formed on the back and engaging an inclined guideway or dovetailed groove 0 formed on the forward end of the jaw O. The guideway 0 extends in an oblique direction toward the shank A, and the bottom of said guideway is closed to limit the downward or outward sliding movement of the cheek-piece C, it being understood that the latter,owin g to the construction described, isfree to slide inward in the guideway (J and in an oblique direction toward the shank A, but with the face of the cheek-piece at all times parallel with that of the cheek-piece B. The upper end 0 of the cheek-piece O is preferably forked to straddle the shank A, thus j aw C and abuttingagainst the underside of the shank A, as "is plainly shown in Fig. 2,

Now by the arrangement described the cheekpiece, is free to slide in its guideway 0 and consequently when an object is gripped 'between the cheekpieces'B and C and pressure is applied then the cheek-piece sl ides toward? the shank A to more securely grip the object.

Previouslyto using the device for gripping, the object the operator presses the head D, so as to bringthe movable jaw O in position, the;-

cheek-pieces'B and C'Jllst engaging the 0b-,

' ject on opposite sides, 'theeheek-piece U he tendency to move the cheek-piece C in en-i gagemen-t with theworkand whenitiis desired to release the latter then the spring is icorn pressedin the head D ,so thattheicheek-ipieceg V C easily :moves out of engagement with zth'ei object to allow of removing the wrench I Havingthus fully described ,m-ydnvention I I-cl'aim as new and desire tosecure-by :Leltiters 1. A wrench comprising :a shankfafixed; jaw, a jaw movable on the shank, a bearing; held on said shank, ascrewmodlengagingitlie g movablev jaw toadjustthesanreontheshank,

the said serjewared being mounted to tumn said bearing and salso ':havingslidingemovd5 men-t a head-on said screw-rod for tnnning.v

'thesame, the said head being normallytsepsi arated from said 'bearin g, and a :spningihel in opposing recessesin th'elheadanl ibea nin gfl substantially as-desor-ibed. V 1. 4 7,

*2. A wrenchcompr isinga shanktajawfixed} on the shank, a vjaw movable ':0I1 the shank, eag' cheek piece-free to slide. on the zm 'ovalilevg'ia-vk,

and 1 a spring-pressed sere-wq'ed engaging irhe a screw-rodengaging thezin'ovablelgjaw to ad asfdeseri bedr I m ova-ble jaw to adjust \thezsamei'on itlteshamk the said serew rod being mounted to -tum; and having sliding movement, asirbsftantiailvz 1A wrench comprising able on the movable jaw, a'spring-held-on the a movable jaw and pressing-"said cheek pieea I a 'shank, s nner a I j aw, a movable g aw having a'oheekepieoe slidi j ust the'same on-t'he shank, abearing inwhicli saidrserew-modi'isftmountedmoturnand:to'slide, a head on said screw-rod adjacentto the bear ing for turning the ser'ew-rod,'and a spring for pressing thescrew-rod in a longitudinal direction, the said spring normally holding the headiseparated fro'm the be'aring, substantially as described. A

4. A wrench comprising a handled shank, a "jawfixed on the shank, a movable jaw slid; on the shank and having acheek-piece lslidableon the movable jaw toward the shank and in an oblique direction thereto, a screwrodshrewing ineaidmovable jaw and mount= -ed-to turn and to slide in a bearing on the as-show-n and described! 5, Awreneh comprisingsas'hank, arjaw fix ed on ;Ithe1shank aw movable on the shank, a I cheek-apiece free to slide on the said movable jaw,' and aspriing pressed.screwqod *for adforjreleasi ng the movable jalw, surbstwmtiwll y shank, and a spring pressing lthesaidis'orew rod in a longiitndinal direetien, substantially justingthe movable jaw on said shank, sand asash o'vwn:and deseri bed. l v a A wrencheo'mpnisingfahandled shank,

1 a jawrfixedon the-shank provided'with a cheek-piece, a jaw movable on the shank a cheek'- piiece zfreeP-to slide on thesa'id movable Ij'a-w, a collar held :on th'eshank adjacent to the handle and :formed with a hearing :at one l side thereof, a screw-rodhavinga smoothend nrnfomzrted in said beating and aa threaded-ed engaging the movable flaw to adgiu st'thesame ion ,the shank, a head on :s'aid screw-rod for Y'head ibeing forward f, thesaiid bearing and a spring surrounding itfhe smooth end :of the ing the 'screlw mod i'n alongitudinaldirection, g'su bstantially asdescribe ;In testimony whereof. Iwhavefsigne'd any mam-e to thi'sspecifica-t'ion in the. preseneerof t woasabsciiiibingwwitnesses. v V r "lTifroMA's nsaosmnnn. Witnesses: V Y I ALDEN,

I ":"I B. CLA RY turni ng -thescrew-irod in its rbear-ing, thesaid jz's'erewsrod :a'nd 1h eld1 inopposing recesses in :sairsl head and lbearinggthe said spring' gpress 

